Considerations of symmetry in the cortical integration of tetrahymena doublets.
Considerations of symmetry in the cortical integration of tetrahymena doublets.
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四膜虫双联体皮质整合对称性的考虑。
DOI：
10.1002/jez.1401930102
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
Barbara Wozencraft
中科院分区：
文献类型：
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作者：
D. Nanney;Margaret Chow;Barbara Wozencraft
同基因1、T.梨形，可以通过用固定化抗血清处理缀合对来诱导。这些双峰的几何特性和基体人口一般表示独立的自主综合系统的两个半部。双相系统虽然是亚稳态的，但通过一个“简化”的过程，它又被转化回单相状态。这种转化不是一个单一的事件，而是一系列的变化，涉及不同的结构和过程在不同的时间发生变化;微核和大核;通过气孔发生产生两个口腔器官的能力和通过口腔替代发展它们的能力;细胞前端和后端的结构;对于纤毛行的数量和对于构成行的基体的数量。虽然组成一对的两个半细胞在重要的方面是相互独立的，但它们在重要的方面是协调的。收缩泡孔的位置和数量不仅取决于半细胞中纤毛排的数量，而且还取决于对生双胞中纤毛排的数量。最值得注意的是，双口发生的可能性，因此双口器的永存，取决于半细胞的对称性。随着双链体结构和功能的各个方面逐渐巩固，细胞作为一个整体在较长的时间间隔内保持为一个完整的单元。
Homopolar doublets of syngen 1, T. pyriformis, may be induced by treatment of conjugating pairs with immobilizing antiserum. These doublets have geometric properties and basal body populations generally indicative of separate autonomous integrative systems in the two halves. The duplex system, though metastable, is transformed through a process of "simplification" back to the simplex state. The transformation is not a single event, but a series involving changes at different times for different structures and processes; for the micronuclei and the macronuclei; for the capacity to generate two oral apparatuses through stomatogenesis and the capacity to develop them through oral replacement; for the structures at the anterior and posterior ends of the cell; for the numbers of ciliary rows and for the numbers of basal bodies which make up the rows. Although the two semicells composing a doublet are in important respects independent of each other, they are coordinated in significant ways. The positions of the contractile vacuole pores and their numbers depend not only on the number of ciliary rows in a semicell, but also on the number of ciliary rows in the opposing twin. Most notably, the probability for dual stomatogenesis, and hence the perpetuation of the doubled oral apparatus, depends on the symmetry of the semicells. The cell as a whole is maintained as an integrated unit over a prolonged interval as various aspects of duplex structure and function are progressively consolidated.